1 /*
2 * Copyright (c) 2017-2018 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #ifdef __aarch64__
25
26 #include <arm_neon.h>
27
28 #include "../../asmlib.hpp"
29
30 // Kernel implementation.
31 //
32 // Assume that "Apanel" points to a chunk of A blocks (each size 8xK) in read-order.
33 // Assume that "Bpanel" points to a chunk of B blocks (each size 12xK) in read-order.
34 // Assume that "Cpanel" points to a chunk of C output blocks (each size
35 // 12x8), the chunks being arranged in a row major fashion.
36 //
37 // Note that the intent of this is that either ablocks or bblocks will be 1
38 // - this construction allows the output loop to proceed in either order.
39
40 namespace arm_gemm {
41
a64_sgemm_asimd_8x12(const float * Apanel,const float * Bpanel,float * Cpanel,int ablocks,int bblocks,int K)42 void a64_sgemm_asimd_8x12(const float *Apanel, const float *Bpanel, float *Cpanel, int ablocks, int bblocks, int K) {
43 const float *a_ptr = Apanel;
44 float *c_ptr = Cpanel;
45
46 for (int yb=0; yb<ablocks; yb++) {
47 const float *a_ptr0 = a_ptr;
48 const float *b_ptr = Bpanel;
49
50 for (int xb=0; xb<bblocks; xb++) {
51 a_ptr = a_ptr0;
52 // Fix up for odd lengths - set a flag if K is odd, but make
53 // sure we round up the iteration count.
54 int oddk = (K & 1);
55 int k = ((K+1)/2) - 1;
56
57 register float32x4_t a0 asm("v0");
58 register float32x4_t a1 asm("v1");
59 register float32x4_t b0 asm("v2");
60 register float32x4_t b1 asm("v3");
61 register float32x4_t b2 asm("v4");
62 register float32x4_t a0a asm("v5");
63 register float32x4_t a1a asm("v6");
64
65 __asm __volatile (
66 // Initialize result registers, load initial operands, prime prefetches.
67 "movi v8.4s, #0x0\n"
68 "ldr %q[a0], [%[a_ptr]]\n"
69 "movi v9.4s, #0x0\n"
70 "ldr %q[b0], [%[b_ptr]]\n"
71 "movi v10.4s, #0x0\n"
72 "ldr %q[a1], [%[a_ptr], #16]\n"
73 "movi v11.4s, #0x0\n"
74 "ldr %q[b1], [%[b_ptr], #16]\n"
75 "movi v12.4s, #0x0\n"
76 ASM_PREFETCH("[%[b_ptr], #64]")
77 "movi v13.4s, #0x0\n"
78 ASM_PREFETCH("[%[a_ptr], #64]")
79 "movi v14.4s, #0x0\n"
80 ASM_PREFETCH("[%[b_ptr], #128]")
81 "movi v15.4s, #0x0\n"
82 ASM_PREFETCH("[%[a_ptr], #128]")
83 "movi v16.4s, #0x0\n"
84 ASM_PREFETCH("[%[b_ptr], #192]")
85 "movi v17.4s, #0x0\n"
86 ASM_PREFETCH("[%[b_ptr], #256]")
87 "movi v18.4s, #0x0\n"
88 ASM_PREFETCH("[%[a_ptr], #192]")
89 "movi v19.4s, #0x0\n"
90 ASM_PREFETCH("[%[b_ptr], #320]")
91 "movi v20.4s, #0x0\n"
92 ASM_PREFETCH("[%[a_ptr], #256]")
93 "movi v21.4s, #0x0\n"
94 ASM_PREFETCH("[%[b_ptr], #384]")
95 "movi v22.4s, #0x0\n"
96 "movi v23.4s, #0x0\n"
97 "movi v24.4s, #0x0\n"
98 "movi v25.4s, #0x0\n"
99 "movi v26.4s, #0x0\n"
100 "movi v27.4s, #0x0\n"
101 "movi v28.4s, #0x0\n"
102 "movi v29.4s, #0x0\n"
103 "movi v30.4s, #0x0\n"
104 "movi v31.4s, #0x0\n"
105
106 // Skip loop if we are doing zero iterations of it.
107 "cbz %w[k], 4f\n"
108
109 // Loop proper
110 "1:\n"
111 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
112 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
113 "ldr %q[b2], [%[b_ptr], #32]\n"
114 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
115 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
116 "ldr %q[a0a], [%[a_ptr], #32]\n"
117 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
118 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
119 "ldr %q[a1a], [%[a_ptr], #48]\n"
120 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
121 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
122 "ldr %q[b0], [%[b_ptr], #48]\n"
123
124 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
125 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
126 ASM_PREFETCH("[%[a_ptr], #320]")
127 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
128 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
129 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
130 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
131 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
132 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
133 "ldr %q[b1], [%[b_ptr], #64]\n"
134
135 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
136 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
137 ASM_PREFETCH("[%[b_ptr], #448]")
138 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
139 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
140 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
141 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
142 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
143 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
144 "ldr %q[b2], [%[b_ptr], #80]\n"
145
146 "fmla v8.4s , %[b0].4s, %[a0a].s[0]\n"
147 "fmla v9.4s , %[b0].4s, %[a0a].s[1]\n"
148 "ldr %q[a0], [%[a_ptr], #64]\n"
149 "fmla v10.4s, %[b0].4s, %[a0a].s[2]\n"
150 "fmla v11.4s, %[b0].4s, %[a0a].s[3]\n"
151 "fmla v12.4s, %[b0].4s, %[a1a].s[0]\n"
152 "ldr %q[a1], [%[a_ptr], #80]\n"
153 "fmla v13.4s, %[b0].4s, %[a1a].s[1]\n"
154 "fmla v14.4s, %[b0].4s, %[a1a].s[2]\n"
155 "fmla v15.4s, %[b0].4s, %[a1a].s[3]\n"
156 "ldr %q[b0], [%[b_ptr], #96]\n"
157
158 "fmla v16.4s, %[b1].4s, %[a0a].s[0]\n"
159 "fmla v17.4s, %[b1].4s, %[a0a].s[1]\n"
160 ASM_PREFETCH("[%[b_ptr], #512]")
161 "fmla v18.4s, %[b1].4s, %[a0a].s[2]\n"
162 "fmla v19.4s, %[b1].4s, %[a0a].s[3]\n"
163 "fmla v20.4s, %[b1].4s, %[a1a].s[0]\n"
164 "fmla v21.4s, %[b1].4s, %[a1a].s[1]\n"
165 "fmla v22.4s, %[b1].4s, %[a1a].s[2]\n"
166 "fmla v23.4s, %[b1].4s, %[a1a].s[3]\n"
167 "ldr %q[b1], [%[b_ptr], #112]\n"
168
169 "fmla v24.4s, %[b2].4s, %[a0a].s[0]\n"
170 "fmla v25.4s, %[b2].4s, %[a0a].s[1]\n"
171 "add %[a_ptr], %[a_ptr], #64\n"
172 "fmla v26.4s, %[b2].4s, %[a0a].s[2]\n"
173 "fmla v27.4s, %[b2].4s, %[a0a].s[3]\n"
174 "add %[b_ptr], %[b_ptr], #96\n"
175 "fmla v28.4s, %[b2].4s, %[a1a].s[0]\n"
176 "fmla v29.4s, %[b2].4s, %[a1a].s[1]\n"
177 "subs %w[k], %w[k], #1\n"
178 "fmla v30.4s, %[b2].4s, %[a1a].s[2]\n"
179 "fmla v31.4s, %[b2].4s, %[a1a].s[3]\n"
180 "bne 1b\n"
181
182 // Target to use when K is 1 or 2 (i.e. zero iterations of main loop)
183 "4:\n"
184
185 // Branch to alternative tail for odd K
186 "cbnz %w[oddk], 2f\n"
187
188 // Detached final iteration (even K)
189 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
190 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
191 "ldr %q[b2], [%[b_ptr], #32]\n"
192 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
193 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
194 "ldr %q[a0a], [%[a_ptr], #32]\n"
195 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
196 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
197 "ldr %q[a1a], [%[a_ptr], #48]\n"
198 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
199 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
200 "ldr %q[b0], [%[b_ptr], #48]\n"
201
202 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
203 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
204 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
205 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
206 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
207 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
208 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
209 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
210 "ldr %q[b1], [%[b_ptr], #64]\n"
211
212 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
213 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
214 "add %[a_ptr], %[a_ptr], #64\n"
215 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
216 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
217 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
218 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
219 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
220 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
221 "ldr %q[b2], [%[b_ptr], #80]\n"
222
223 "fmla v8.4s , %[b0].4s, %[a0a].s[0]\n"
224 "fmla v16.4s, %[b1].4s, %[a0a].s[0]\n"
225 "add %[b_ptr], %[b_ptr], #96\n"
226 "fmla v9.4s , %[b0].4s, %[a0a].s[1]\n"
227 "str q8, [%[c_ptr], #0]\n"
228 "fmla v17.4s, %[b1].4s, %[a0a].s[1]\n"
229 "str q16, [%[c_ptr], #16]\n"
230 "fmla v24.4s, %[b2].4s, %[a0a].s[0]\n"
231 "str q24, [%[c_ptr], #32]\n"
232
233 "fmla v25.4s, %[b2].4s, %[a0a].s[1]\n"
234 "str q9, [%[c_ptr], #48]\n"
235 "fmla v10.4s, %[b0].4s, %[a0a].s[2]\n"
236 "str q17, [%[c_ptr], #64]\n"
237 "fmla v18.4s, %[b1].4s, %[a0a].s[2]\n"
238 "str q25, [%[c_ptr], #80]\n"
239 "fmla v26.4s, %[b2].4s, %[a0a].s[2]\n"
240 "str q10, [%[c_ptr], #96]\n"
241
242 "fmla v11.4s, %[b0].4s, %[a0a].s[3]\n"
243 "str q18, [%[c_ptr], #112]\n"
244 "fmla v19.4s, %[b1].4s, %[a0a].s[3]\n"
245 "str q26, [%[c_ptr], #128]\n"
246 "fmla v27.4s, %[b2].4s, %[a0a].s[3]\n"
247 "str q11, [%[c_ptr], #144]\n"
248
249 "fmla v12.4s, %[b0].4s, %[a1a].s[0]\n"
250 "str q19, [%[c_ptr], #160]\n"
251 "fmla v20.4s, %[b1].4s, %[a1a].s[0]\n"
252 "str q27, [%[c_ptr], #176]\n"
253 "fmla v28.4s, %[b2].4s, %[a1a].s[0]\n"
254 "str q12, [%[c_ptr], #192]\n"
255
256 "fmla v13.4s, %[b0].4s, %[a1a].s[1]\n"
257 "str q20, [%[c_ptr], #208]\n"
258 "fmla v21.4s, %[b1].4s, %[a1a].s[1]\n"
259 "str q28, [%[c_ptr], #224]\n"
260 "fmla v29.4s, %[b2].4s, %[a1a].s[1]\n"
261 "str q13, [%[c_ptr], #240]\n"
262
263 "fmla v14.4s, %[b0].4s, %[a1a].s[2]\n"
264 "str q21, [%[c_ptr], #256]\n"
265 "fmla v22.4s, %[b1].4s, %[a1a].s[2]\n"
266 "str q29, [%[c_ptr], #272]\n"
267 "fmla v30.4s, %[b2].4s, %[a1a].s[2]\n"
268 "str q14, [%[c_ptr], #288]\n"
269
270 "fmla v15.4s, %[b0].4s, %[a1a].s[3]\n"
271 "str q22, [%[c_ptr], #304]\n"
272 "fmla v23.4s, %[b1].4s, %[a1a].s[3]\n"
273 "str q30, [%[c_ptr], #320]\n"
274 "fmla v31.4s, %[b2].4s, %[a1a].s[3]\n"
275 "str q15, [%[c_ptr], #336]\n"
276
277 "b 3f\n"
278
279 // Detached final iteration (odd K)
280 "2:\n"
281 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
282 "ldr %q[b2], [%[b_ptr], #32]\n"
283 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
284 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
285 "str q8, [%[c_ptr], #0]\n"
286 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
287 "str q16, [%[c_ptr], #16]\n"
288 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
289 "add %[b_ptr], %[b_ptr], #48\n"
290 "add %[a_ptr], %[a_ptr], #32\n"
291 "str q24, [%[c_ptr], #32]\n"
292 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
293 "str q9, [%[c_ptr], #48]\n"
294
295 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
296 "str q17, [%[c_ptr], #64]\n"
297 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
298 "str q25, [%[c_ptr], #80]\n"
299 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
300 "str q10, [%[c_ptr], #96]\n"
301
302 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
303 "str q18, [%[c_ptr], #112]\n"
304 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
305 "str q26, [%[c_ptr], #128]\n"
306 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
307 "str q11, [%[c_ptr], #144]\n"
308
309 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
310 "str q19, [%[c_ptr], #160]\n"
311 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
312 "str q27, [%[c_ptr], #176]\n"
313 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
314 "str q12, [%[c_ptr], #192]\n"
315
316 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
317 "str q20, [%[c_ptr], #208]\n"
318 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
319 "str q28, [%[c_ptr], #224]\n"
320 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
321 "str q13, [%[c_ptr], #240]\n"
322
323 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
324 "str q21, [%[c_ptr], #256]\n"
325 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
326 "str q29, [%[c_ptr], #272]\n"
327 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
328 "str q14, [%[c_ptr], #288]\n"
329
330 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
331 "str q22, [%[c_ptr], #304]\n"
332 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
333 "str q30, [%[c_ptr], #320]\n"
334 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
335 "str q15, [%[c_ptr], #336]\n"
336
337 // Common tail
338 "3:\n"
339 "str q23, [%[c_ptr], #352]\n"
340 "str q31, [%[c_ptr], #368]\n"
341 "add %[c_ptr], %[c_ptr], #384\n"
342 :
343 [a_ptr] "+r" (a_ptr), [b_ptr] "+r" (b_ptr), [c_ptr] "+r" (c_ptr),
344 [a0] "+w" (a0), [a1] "+w" (a1), [a0a] "+w" (a0a), [a1a] "+w" (a1a),
345 [b0] "+w" (b0), [b1] "+w" (b1), [b2] "+w" (b2), [k] "+r" (k)
346 : [oddk] "r" (oddk)
347 : "x20", "x21", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18",
348 "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", "cc"
349 );
350 }
351 }
352 }
353
354 } // namespace arm_gemm
355
356 #endif
357